One-way clutch



FebQlO, 1942. A. J. RANBEQG 2,272,169

ONE-WAY CLUTCH Filed Jung 5, 1939 I 2 Sheets-Sheet 1 nvmvron, ALBERT 'J.amuse-Ra.

Feb. 10, 1942. A. J..GRANBERG 2,272,159

' ONE-WAY CLUTCH Filed June 5, v1959 2 Sheets-Sheet 2 INVENTOR, 4

I ALBERT J. GRANBERG.

a right clutch l0.

- though I prefer to use the type of I 1 1 H I Albert J. Granberg,Berkeley, CaJif.,..assignor to Granberg Equipment, Inc., Emeryville,'Califi,

a corporationof California A l ca ion June 1939, Serial No. 27 1, 295;-5I( Jlaim s. .(o 19.2-45.1) 1

My invention'relates to a one-way clutch and more particularly to aone-way clutch ideally adapted for use in a twin pump assembly.

Among the objects of my invention are: To

provide a simple and efiicient one-way'clutch; J

to provide a means for automatically and selectively operating one oftwo pumps in a'twin pump unit in accordance with the will of anoperator; and to provide a clutch means for selecting :one pump and.excluding the operation of the other in a twin pump unit. I p

Other objects of my invention will be appar ent or will bespecificallypointed out in the description forming a part of thisspecification,

but I do. not limit myself to "the embodiment of the invention hereindescribed, as various forms may be adopted within the scope of theclaims.

Referring to the drawings: 1

Fig. l is a diagrammatic plan view of one preferred form of a twin pumpunit embodying my invention, together with 'a wiring diagram for theoperation thereof.

Figs. 2 and 3 are cross-sectional views, taken as indicated by the lines2-2 and 33, re-

spectively, in Fig. 1.

Fig. l'is a longitudinal sectional View, taken as indicated by the line4-4 in Fig. 2. Fig. 5 is a top plan view of. an optional gear drive.

Fig. 6 is a sectional view, taken as indicated by the line 5-45 in Fig;5. I

Fig. 7 is a longitudinal sectional view, taken as indicated by the line1-4 in Fig. 6.

Referring directly to'the' drawings for a more detailed description ofthe preferred form of my invention as shown in the various figures, andreferring first to Fig. 1, a motor I drives a pinion 2 through flexiblecoupling 3. Pinion 2 is enclosed in gear case 4 in which is mounted acrossshaft 5 carrying a bevel gear 6- meshed with pinion 2. Cross-shaft5 extends outside of the casing on both sides thereof. On eachend of thecross-shaft is mounted a left clutch 9 and Right clutch shaft llconnectsthrough right flexible coupling l2 to right pump l4, which maybe of any known type, alpump described andclaimed by me in' my priorapplication for United States Letters Patent'entitled Pump, Serial No..1 938.

In the lefthand side of the gear case 4 the clutch shaft E5 of clutch 9leads through flexible coupling I6 to left pump H, which may be aduplicate of pump MJMotor l is supplied with 247,765, filed December '7,

powerby line i9, preferably from three'phase alternating current mains'20 through the ous tomary. fuse box 2.! and .:a" reversing switch 22.-

Thus, motor l-can bedriven in either direction in accordance with theposition of the reversing switch handle 25, which .maybe placed withinreach. of a fuel loading operator'at any desired distance from theypumpunit itself.

- in one direction but which will disconnect when .The selective actionof the'zpump unit above described depends upontheselective action ofclutches 9 and 10. These clutch'esarejof the 'so called free wheelingtype, which will drive runningjin the" opposite direction;

The' internal construction, of these "clutches may be; more readilyunderstood ;by reference toFigs. 2,3;and'4. Pumprcr'oss-shaf-tiii, oneither side of casing-4;is-provided thereon.witha pair of eccentric cams26 and 21, mounted side by side, Fitting cam 26 is a clutch shoe 29, andfittingcam '21 is a second clutch shoe 30. These clutch shoes areprovided on the periphery thereof with, clutch surfaces 3lwhich are.curved to engage the inner surface. of outer casing 32' of the clutchassembly; Outer casing 32' is connected through fitting 34'to right andleft pump shafts H or IE, inaccordance with the side on movement towardeach other. The contact be which the clutch is being used." Thus, whenthe shaft 5 is being rotated, in one direction, cams 26 and 21 throw theclutch shoes 29 and 30 out-- .wardly until the clutch surfaces 3| on,each

clutch shoe engage and lock to the inner sur-' face of clutch casing 32,thereby driving the conor IT. When shaft 5 is rotated nected pump [4direction, however, cams 26 and in the opposite 21 drawthe clutch'shoestogether until they contactoncenter line 35, which prevents furthertween clutching surfaces 3land'the interior of casing 32. is broken andthe shaftB ceases to drive the connected pump.

Clutches 9 and I0, mounted on reverse action with respectto the pumps l4and the pumpto be driven can be selected by selectv I1 because the pumpsface each other. so that I when the pump on'oneside is being driven thethe other side is disconnected. Thus,

ing the' direction of rotation of motor I, which is done by the operatorby remote control operation of reversing switch handle 24. "It isimpossible. in this manner, to drivefboth pumps from the same motor,thus preventing overloading of the moton. The time required for loadingis reduced, as it is not necessary for theoperator to gofr'om' a loadingrack to the pump shaft 5, give house to change clutches from one pump toanother in order to change liquid flow at the loading rack. Either ofthe pumps can be selected at will from the loading platform.

In Figs. 5, 6 and 7 I have shown a modification of my unit, utilizing acentral spur gear 50 mounted on the shaft of motor I, driving lateralspur gears and 52. Here, the gears 5| and 52 are journaled to ridefreely on pump shafts II or 15, and clutch casing 32 is made an-integralpart of each lateral spur gear. Clutch casing 32, in this case, ispreferably closed by an end plate 54, providing a bearing 55 for the endof shafts lI-l 5. Cams 26 and 21 are mounted on pump shafts II or [5,clutch shoes 29 and 30 are mounted on the cams, as described above, andthus the entire clutch assembly is supported on the pump shaft withoutadditional bearings.

The selective operation of the free wheeling clutches is exactly asdescribed above for the bevel gear drive, in that one of the clutcheswill drive one of the pumps when the motor I is running in onedirection, and the other clutch will drive the other pump when the motordirection is reversed. At no time can both pumps be operated at the sametime.

While I have illustrated gear drives for the two pumps, it will beobvious to those skilled in the art that direct drive can be used, withthe clutches placed, one on each end of the motor shaft.

Thus, it will be seen that I am able to select one of two pumps to bedriven by a single motor, by simply reversing the "direction of rotationof the motor, and this reversal of rotational direction can easily beaccomplished at a distance by the use of a reversing switch in the mainpower supply line to the motor.

I claim:

1. A clutch comprising a drive shaft, a pair of circular cams fastenedin opposite eccentricity on said shaft, a clutch casing rotatablybearing at one end thereof on said drive shaft and extending outwardlyand then over said cams to define a clutch space, and having an interiorsurface concentric with said shaft, at the other end thereof, saidcasing having a central bearing for supporting an end of said shaft, apair of shoe plates each having a bearing aperture rotatably fitting oneof said cams, said plates extending laterally in opposite directionsfrom said cams, a shoe having a face of substantially the same curvatureas said internal surface and opposed thereto mounted on each shoe plate,said shoes being engaged and disengaged with said surface in accordancewith the direction of rotation of said shaft with respect to saidcasing, and a driven member concentrically mounted on said casing.

2. Apparatus in accordance with claim 1 Wherein said driven member is agear forming a part of said casing.

3. Apparatus in accordance with claim 1 wherein said driven member is ashaft coaxially attached to said casing.

4. Apparatus in accordance with claim 1 wherein said shoe plates haveopposed inner edges making contact in disengaged position.

5. Apparatus in accordance With claim 1 wherein each of said shoes havefaces of less than of arc each and are held on said cams only by havingend faces terminating adjacent each end of said casing to prevent axialmovement.

ALBERT J. GRANBERG.

